Jayathilaka, K.M.D.S. <br/><br/>
උසස් පෙළ දෛශික 
= usas peLa dyshika 


 - Colombo:  Pubudu prakashakayo,  1977. 
 - 159p.;  21cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>519.5  / JAY